Heavy rains have eroded the Ankarana Plateau into caves and canyons topped by sharp rock formations known as tsingy.

Following is the transcript of a voice call received this afternoon from producer Peter Tyson, who is on location in the Ankarana Reserve.

Peter Tyson voice call:
I arrived in the Ankarana Reserve after 48 hours of travel from Boston to Paris to Antananarivo, the capital of Madagascar, then took another flight up to Diego Suarez in the north, got a car and drove south to the Reserve, which we reached yesterday around 4 pm here, about 9 am Eastern Standard Time. Nick Gordon, the cinematographer, is here filming the crowned lemurs along with his camera assistant Neil Shaw and the Malagasy guides Angelin and Angeluc Razafimanantsoa.

Angeluc and I took a hike this morning. It was about a one-hour, five-mile hike and we shot some pictures of the severely eroded limestone pinnacles known as the tsingy up there. We got back late this morning and I've been working on computer problems ever since.